Adjustable handle for tools.



W. H. GLARKS0N.

ADJUSTABLE HANDLE FOR TOOLS.

APPLICATION FILED JAN. 3, 1910.

Lg Y Patented Jau?, 1913.

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WILLIAM GLARKSON, OF EDWARDS STATL'ON, ELINOXS, ASSIGNOR 5,0 ELIUD J..

' CLARKSN, F EDWARDS STATION, ILLNOIS.

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Specification of Letters Patent.

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Application led January 3, ,1910. Serial No. 536,139.

` To all whom/it may concern:

Be it known that I, WiLLIAM H. CLARK- .soN, citizen of the UnitedStates, residing at Handles and Tools; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable ,others skilled in the art to which it apport-aine tomake and use the same.

his `invention relates to a device for driving rotatable machineelements and pertains moreparticularly to a crank for positiveconnection with a rotatable tool.

One of the' objects of the invention is to provide a crank for arotatable element that when in use cannot become readily detached fromsaid element.

Another object is to provide means for securing' machine elements inoperative relation.

' Another object is. to provide a crank for a rotatable element thatwhen attached will not become separated except by design of the user andthat can be made to positively remain in any desired adjustment.

In nthe accompanying drawing ,Figure 1 is a perspective view of parts ofmy inven tion disassembled. Fig. 2 is a longitudinal section of theparts comprising my invention having the shank of a tool in connectiontherewith. Fig. 3 is a front elevation with part in cross section. Fig.t. is a longitudinal section of a tubular handle in part section. Fig. 5is an end elevation of the same. Fig. `6 is a transverse section of apart of the device shown in Fig. 2. y

It is the purpose of my invention to provide a driving crank for tools,or machine elements, which can be readily adjusted in the portion whichit is adapted to turn for conveniently obtainingpower or speed' as maybe desired according to the particular kind of work to be done, and atthe same time so apply the crank that it will not be likely to becomeaccidentally separated from l the said portion.

In thev figures, A indicates a 'casting the larger ror body portion B ofwhich is provided with a socket C, preferably on'e having a taper, orsmaller at one end than the other or'of 'a form to receive the taperingshank of a tool!) to be driven. Also the socket is made square or of anyother desired shape and the said shank is made of a similar form orsothat a positive drive will. result. The casting has an enlargement Eextending at right angles to the longest axis of the body B and has aslot F extending through it at right angles to said longest and whichinterse'cts the socket C preferably at one of the corners or" thelatter.

G is a crank-arm adapted to lie within the slot F and' is shittabletherein for the pur-V poses to be described presently and in order thatsaid arm may be firmly held in any adjustment I provide ,a spring forinstance as shown at H which may be Asuitably held in place Within theslot F therebeing sufficient space bet-Ween one of the Walls of the slotand the said arm G to receive it. 'Sufficient friction is thus providedupon the arm to hold it when adjusted to the desired posi-v tion. Thearm is provided at one extremity with a pin J which may bescrew-threaded in order to hold it in place but it may be otherwisesecured in saidl arm and its purpose is to preventthe arm leaving thebody B when placed therein. Near the other end of the arm, that engagesthe tool D, is a V,- shaped notch K, which, when carried inside theenlargement E by shifting said arm will register with the socket C asshown in Fig. 3 so that the shank of the tool can be freely inserted orWithdrawn and said arm has an, integral extension atright angles to itto thus form a crank preferably of 'one' piece said extension beingglven a quarter turn or twist on itselwlille its free end 1s providedwith an extending lug or pin L. A

tube M to form the handlel for the crank, as

shown in Figs. 4 and 5, and in broken lines in Fig. l, is slipped uponthe twisted portion which is followed vby a washer N Fig.. 4 which liesagainst the end of the tube and receives the lug L. By upsetting orriveting the end of the pin or lug the washer and tube are permanentlyheld upon the crank. This gives a very cheap form of structure and atthe same time rovides one that is perfectly strong itbeing understoodthat by providing the twist in the crank as described and shown the tubeis held from lateral movement'.

The shank of the tool to be driven is provided with a netch for instanceas indicated in Fig. l at O which is preferably Fic. 3, the tool D isthen inserted in its sccret with its notch O in position to receive thecrank'. v Then by shifting the crank through Lthe extension El vitengages the notch to prevent the tool being'vvlthdrawn.

The crank extension which engages the en largement E can be as long asdesired so that considerable leveragecan be had, for

instance when boring 1n very hard sub stances vvhere much power isneeded. It; however, the Workis light it can be done faster and does notrequire as much leverage in which case the handle ofthe crank may hemoved closer ,tothe axis o/the'tool D by shifting its extension rthroughthe enlargement E as will be understood. The spring H at ally timeskeeps considerable frictionupon said crank so that it is properly heldeven when vhanging downward When its own Weight would tend to shift itWithin the slot F.

I have adopted the device described for use for coal drillsWhere'dii'e'ren't strata of material must be bored through and whichdiffer in density and hardness. l/Vhen a soft material is encounteredthe handle of the arm Goan be shifted close to the axis of thedrill-bar, which is the tool D, and a high speed can be used sincelesseffort is needed to drive the arm.l But where a much harder material ismet more power is required with a slowerspeed and when this -occurs thehandle of the c rank is pulled outward or away from the axis of the saiddrillbar ,in'order to provide a greater 'purchase or leverage and Whilemy invention is admirably adapted for this particular purpose it isWelladapted also to-n1any others.

Slight changes may be made,fof course,y

ried by one of `the members to yieldingly 60 and frictionally engage thearm.

`2. The combination with a member to be rotated having a notch'extending vtransversely to its axis of rotation, a second melillav Iber provided With an openln Yto receive the member and having a 'slot tereinlying parallel to the notch and communicating 'therewith,`- an armlying Within the slot and vsaid notch, and a spring lying within theslot and adapted to 'ri'ctionally and '70 yieldingly'engage the arm.:

3: The combination with a member to be rotated having a tapered shanksaid shank having -a notch entendingftransversely to its axis ofrotation, a' second member having 75 a tapered socket to receive theshank and 1 vhaving a -slot therein to communicate with the notch, anarm slidably engaging the slot 4 and notch and adapted there y to holdth'e\ two members in connected relation, and a spring carried by thesaid sec'ond member to frietionally'and yieldingl'y engage the arm.

4. The combination with a member to be rotated, lprovided With atransverse notch,

a second member provided with a socket to receive the first, and alsohaving a transverse slot lintersectimg .the socket and in register Withthe notch, and an arm slidably adjustable in the slot and said notch.

5. The combination'with a member to be rotated, provided with atransverse notch, a second member provided with a socket to receive thefirst, and also having a transverse slot intersecting the socket and inregister with the notch, and an arm slidably adjustable in the slot andsaid notch, and provi led vwith a notch corre-V spond'ing with t c.socket to expose the same and adapted when in register there-A with torelease the first said member.

' 6. lhe combination with a member to be rotated provided with atransverse'notch, a second member provided with a socket to receive theiirst said member and having a transverse slot intersecting the socket'and adapted to register with the notch, and an arm slidably adjustablein the slot and said notch, said arm having means to preventits'withdrawal from the member carrying it, 110

and having :i notch to permit the separation of the members.

